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<p>Feign&#x7EE7;&#x627F;&#x4E86;Ribbon,&#x800C;&#x4E0E;Ribbon&#x4E0D;&#x540C;&#x7684;&#x662F;&#xFF0C;&#x901A;&#x8FC7;Feign&#x53EA;&#x9700;&#x8981;<strong>&#x5B9A;&#x4E49;&#x670D;&#x52A1;&#x7ED1;&#x5B9A;&#x63A5;&#x53E3;&#x4E14;&#x4EE5;&#x58F0;&#x660E;&#x5F0F;&#x7684;&#x65B9;&#x6CD5;</strong>&#xFF0C;&#x7B80;&#x5355;&#x800C;&#x4F18;&#x96C5;&#x7684;&#x5B9E;&#x73B0;&#x4E86;&#x670D;&#x52A1;&#x8C03;&#x7528;&#x3002;</p>
<p>OpenFeign&#x662F;&#x5728;Feign&#x7684;&#x57FA;&#x7840;&#x4E0A;&#x652F;&#x6301;&#x4E86;SpringMVC&#x7684;&#x6CE8;&#x89E3;&#xFF0C;&#x5982;@RequestMapping&#x7B49;&#x7B49;&#xFF0C;OpenFeign&#x7684;@FeignClient&#x53EF;&#x4EE5;&#x89E3;&#x6790;@Requestmapping&#x6CE8;&#x89E3;&#x4E0B;&#x7684;&#x63A5;&#x53E3;&#xFF0C;&#x5E76;&#x901A;&#x8FC7;&#x52A8;&#x6001;&#x4EE3;&#x7406;&#x4EA7;&#x751F;&#x5B9E;&#x73B0;&#x7C7B;&#xFF0C;&#x5728;&#x5B9E;&#x73B0;&#x7C7B;&#x4E2D;&#x505A;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5E76;&#x8C03;&#x7528;&#x5176;&#x4ED6;&#x670D;&#x52A1;&#x3002;</p>
<p><strong>&#x6B64;&#x5916;&#xFF0C;Feign&#x96C6;&#x6210;&#x4E86;Ribbon</strong></p>
<p><img src="https://tva1.sinaimg.cn/large/e6c9d24ely1h2rg1tvhrcj20xs09ugob.jpg" alt="image-20220525110333346"></p>
<h3 id="2-openfeign&#x7684;&#x63A5;&#x5165;"><a name="2-openfeign&#x7684;&#x63A5;&#x5165;" class="plugin-anchor" href="#2-openfeign&#x7684;&#x63A5;&#x5165;"><i class="fa fa-link" aria-hidden="true"></i></a>2. OpenFeign&#x7684;&#x63A5;&#x5165;</h3>
<ul>
<li><p>2.1.&#x670D;&#x52A1;&#x63D0;&#x4F9B;&#x8005;&#x6309;&#x7167;&#x539F;&#x6709;&#x903B;&#x8F91;&#x6B63;&#x5E38;&#x5199;</p>
</li>
<li><p>2.2.<strong>&#x670D;&#x52A1;&#x6D88;&#x8D39;&#x8005;&#x7AEF;</strong>&#x63A5;&#x5165;OpenFeign&#xFF0C;&#x76F8;&#x5F53;&#x4E8E;&#x4EE3;&#x66FF;&#x4E86;RestTemplate&#x7684;&#x8BF7;&#x6C42;&#x8C03;&#x7528;</p>
</li>
<li><p>2.3.Feign&#x81EA;&#x5E26;&#x8D1F;&#x8F7D;&#x5747;&#x8861;</p>
</li>
<li><p>2.4.&#x63A5;&#x5165;</p>
</li>
</ul>
<p>  pom.xml</p>
<pre><code class="lang-xml">  <span class="hljs-tag">&lt;<span class="hljs-name">dependencies</span>&gt;</span>

          <span class="hljs-comment">&lt;!-- OpenFeign &#x4F9D;&#x8D56; --&gt;</span>
          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.springframework.cloud<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>spring-cloud-starter-openfeign<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>

          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.springframework.cloud<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>spring-cloud-starter-netflix-eureka-client<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>

          <span class="hljs-comment">&lt;!--web--&gt;</span>
          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.springframework.boot<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>spring-boot-starter-web<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>
          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.springframework.boot<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>spring-boot-starter-actuator<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>

          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.springframework.boot<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>spring-boot-devtools<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">scope</span>&gt;</span>runtime<span class="hljs-tag">&lt;/<span class="hljs-name">scope</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">optional</span>&gt;</span>true<span class="hljs-tag">&lt;/<span class="hljs-name">optional</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>
          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.projectlombok<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>lombok<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">optional</span>&gt;</span>true<span class="hljs-tag">&lt;/<span class="hljs-name">optional</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>
          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>org.springframework.boot<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>spring-boot-starter-test<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">scope</span>&gt;</span>test<span class="hljs-tag">&lt;/<span class="hljs-name">scope</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>

          <span class="hljs-tag">&lt;<span class="hljs-name">dependency</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">groupId</span>&gt;</span>com.*******.springcloud<span class="hljs-tag">&lt;/<span class="hljs-name">groupId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">artifactId</span>&gt;</span>api-common<span class="hljs-tag">&lt;/<span class="hljs-name">artifactId</span>&gt;</span>
              <span class="hljs-tag">&lt;<span class="hljs-name">version</span>&gt;</span>${project.version}<span class="hljs-tag">&lt;/<span class="hljs-name">version</span>&gt;</span>
          <span class="hljs-tag">&lt;/<span class="hljs-name">dependency</span>&gt;</span>

      <span class="hljs-tag">&lt;/<span class="hljs-name">dependencies</span>&gt;</span>
</code></pre>
<p>  application.yml</p>
<pre><code class="lang-yml"><span class="hljs-attr">  server:</span>
<span class="hljs-attr">    port:</span> <span class="hljs-number">80</span>


<span class="hljs-attr">  eureka:</span>
<span class="hljs-attr">    client:</span>
<span class="hljs-attr">      register-with-eureka:</span> <span class="hljs-literal">true</span>
<span class="hljs-attr">      fetch-registry:</span> <span class="hljs-literal">true</span>
<span class="hljs-attr">      service-url:</span>
<span class="hljs-attr">        defaultZone:</span> http://localhost:<span class="hljs-number">7001</span>/eureka/
<span class="hljs-attr">  spring:</span>
<span class="hljs-attr">    application:</span>
<span class="hljs-attr">      name:</span> eureka-consumer-order

  <span class="hljs-comment"># &#x8BBE;&#x7F6E;feign &#x5BA2;&#x6237;&#x7AEF;&#x8D85;&#x65F6;&#x65F6;&#x95F4;(OpenFeign&#x9ED8;&#x8BA4;&#x652F;&#x6301;ribbon)</span>
<span class="hljs-attr">  ribbon:</span>
    <span class="hljs-comment"># &#x8BBE;&#x7F6E;&#x5EFA;&#x7ACB;&#x8FDE;&#x63A5;&#x540E;&#x4ECE;&#x670D;&#x52A1;&#x5668;&#x8BFB;&#x53D6;&#x5230;&#x53EF;&#x7528;&#x8D44;&#x6E90;&#x6240;&#x7528;&#x7684;&#x65F6;&#x95F4;</span>
<span class="hljs-attr">    ReadTimeout:</span> <span class="hljs-number">5000</span>
    <span class="hljs-comment"># &#x8BBE;&#x7F6E;&#x5EFA;&#x7ACB;&#x8FDE;&#x63A5;&#x6240;&#x7528;&#x7684;&#x65F6;&#x95F4;,&#x9002;&#x7528;&#x4E8E;&#x7F51;&#x7EDC;&#x72B6;&#x51B5;&#x6B63;&#x5E38;&#x7684;&#x60C5;&#x51B5;&#x4E0B;,&#x4E24;&#x7AEF;&#x8FDE;&#x63A5;&#x6240;&#x7528;&#x7684;&#x65F6;&#x95F4;</span>
<span class="hljs-attr">    ConnectTimeout:</span> <span class="hljs-number">5000</span>
</code></pre>
<p>  &#x542F;&#x52A8;&#x7C7B;</p>
<pre><code class="lang-java">  <span class="hljs-meta">@SpringBootApplication</span>
  <span class="hljs-meta">@EnableFeignClients</span>  <span class="hljs-comment">// &#x542F;&#x7528;Feign&#x529F;&#x80FD;</span>
  <span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">OpenFeignMainOrder80</span> </span>{
      <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span><span class="hljs-params">(String[] args)</span> </span>{
          SpringApplication.run(OpenFeignMainOrder80.class,args);

      }
  }
</code></pre>
<p>  &#x4E1A;&#x52A1;&#x7C7B;</p>
<pre><code class="lang-java">  <span class="hljs-comment">//controller</span>
  <span class="hljs-meta">@RestController</span>
  <span class="hljs-meta">@RequestMapping</span>(<span class="hljs-string">&quot;/order&quot;</span>)
  <span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">OrderController</span> </span>{
      <span class="hljs-meta">@Autowired</span>
      <span class="hljs-keyword">private</span> IRemotePaymentService remotePaymentService;

      <span class="hljs-meta">@GetMapping</span>(<span class="hljs-string">&quot;/getPaymentById/{id}&quot;</span>)
      <span class="hljs-function"><span class="hljs-keyword">public</span> CommonResult&lt;Payment&gt; <span class="hljs-title">get</span><span class="hljs-params">(@PathVariable(<span class="hljs-string">&quot;id&quot;</span>)</span> Long id)</span>{
          CommonResult&lt;Payment&gt; paymentById = remotePaymentService.getPayment(id);
          <span class="hljs-keyword">return</span> paymentById;
      }
  }

  <span class="hljs-comment">//service &#x6CE8;&#x610F;&#x53EA;&#x9700;&#x8981;&#x5199;&#x63A5;&#x53E3;&#x5C31;&#x597D;</span>
  <span class="hljs-meta">@Component</span>
  <span class="hljs-meta">@FeignClient</span>(<span class="hljs-string">&quot;eureka-provider-payment&quot;</span>)<span class="hljs-comment">//&#x58F0;&#x660E;&#x670D;&#x52A1;</span>
  <span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">IRemotePaymentService</span> </span>{
      <span class="hljs-meta">@GetMapping</span>(<span class="hljs-string">&quot;/payment/getPaymentById/{id}&quot;</span>)<span class="hljs-comment">//&#x8981;&#x4E00;&#x81F4; &#x76F8;&#x5F53;&#x4E8E;restTemplate&#x8981;&#x63D0;&#x4F9B;url</span>
      <span class="hljs-function">CommonResult&lt;Payment&gt; <span class="hljs-title">getPayment</span><span class="hljs-params">(@PathVariable(<span class="hljs-string">&quot;id&quot;</span>)</span> Long id)</span>;
  }

  <span class="hljs-comment">// -------&#x63D0;&#x4F9B;&#x8005;&#x7684;controller &#x653E;&#x5728;&#x8FD9;&#x91CC;&#x505A;&#x4E2A;&#x5BF9;&#x6BD4;&#xFF0C;&#x6CE8;&#x610F;&#x26A0;&#xFE0F;&#x6CA1;&#x4EC0;&#x4E48;&#x7279;&#x6B8A;&#x7684;&#x5730;&#x65B9;&#xFF0C;&#x5C31;&#x662F;&#x505A;&#x4E2A;&#x6BD4;&#x8F83;</span>
  <span class="hljs-meta">@RestController</span>
  <span class="hljs-meta">@RequestMapping</span>(<span class="hljs-string">&quot;/payment&quot;</span>)
  <span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">PaymentController</span> </span>{
      <span class="hljs-meta">@Autowired</span>
      <span class="hljs-keyword">private</span> IPaymentService paymentService;

      <span class="hljs-meta">@GetMapping</span>(<span class="hljs-string">&quot;/getPaymentById/{id}&quot;</span>)
      <span class="hljs-function"><span class="hljs-keyword">public</span> CommonResult&lt;Payment&gt; <span class="hljs-title">getPayment</span><span class="hljs-params">(@PathVariable(<span class="hljs-string">&quot;id&quot;</span>)</span> Long id)</span>{
          <span class="hljs-keyword">return</span> paymentService.getPayment(id);
      }
  }
</code></pre>
<h3 id="3openfeign&#x65E5;&#x5FD7;&#x6253;&#x5370;&#x529F;&#x80FD;"><a name="3openfeign&#x65E5;&#x5FD7;&#x6253;&#x5370;&#x529F;&#x80FD;" class="plugin-anchor" href="#3openfeign&#x65E5;&#x5FD7;&#x6253;&#x5370;&#x529F;&#x80FD;"><i class="fa fa-link" aria-hidden="true"></i></a>3.OpenFeign&#x65E5;&#x5FD7;&#x6253;&#x5370;&#x529F;&#x80FD;</h3>
<p>Feign&#x63D0;&#x4F9B;&#x4E86;&#x65E5;&#x5FD7;&#x6253;&#x5370;&#x529F;&#x80FD;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x914D;&#x7F6E;&#x6765;&#x8C03;&#x6574;&#x65E5;&#x5FD7;&#x7EA7;&#x522B;&#xFF0C;&#x4ECE;&#x800C;&#x4E86;&#x89E3;Feign&#x4E2D;Http&#x8BF7;&#x6C42;&#x7684;&#x7EC6;&#x8282;&#x3002;</p>
<p><strong>&#x8BF4;&#x767D;&#x4E86;&#x5C31;&#x662F;&#xFF1A;&#x5BF9;Feign&#x63A5;&#x53E3;&#x7684;&#x8C03;&#x7528;&#x60C5;&#x51B5;&#x8FDB;&#x884C;&#x76D1;&#x63A7;&#x548C;&#x8F93;&#x51FA;&#x3002;</strong></p>
<ul>
<li>3.1.&#x65E5;&#x5FD7;&#x7EA7;&#x522B;</li>
</ul>
<table>
<thead>
<tr>
<th>&#x7EA7;&#x522B;</th>
<th>&#x89E3;&#x91CA;</th>
</tr>
</thead>
<tbody>
<tr>
<td>NONE</td>
<td>&#x9ED8;&#x8BA4;&#x7684;&#xFF0C;&#x4E0D;&#x663E;&#x793A;&#x4EFB;&#x4F55;&#x65E5;&#x5FD7;</td>
</tr>
<tr>
<td>BASIC</td>
<td>&#x4EC5;&#x8BB0;&#x5F55;&#x8BF7;&#x6C42;&#x65B9;&#x6CD5;&#x3001;URL&#x3001;&#x54CD;&#x5E94;&#x72B6;&#x6001;&#x7801;&#x53CA;&#x6267;&#x884C;&#x65F6;&#x95F4;</td>
</tr>
<tr>
<td>HEADERS</td>
<td>&#x9664;&#x4E86;BASIC&#x4E2D;&#x5B9A;&#x4E49;&#x7684;&#x4FE1;&#x606F;&#x4E4B;&#x5916;&#xFF0C;&#x8FD8;&#x6709;&#x8BF7;&#x6C42;&#x548C;&#x54CD;&#x5E94;&#x7684;&#x5934;&#x4FE1;&#x606F;</td>
</tr>
<tr>
<td>FULL</td>
<td>&#x9664;&#x4E86;HEADERS&#x4E2D;&#x5B9A;&#x4E49;&#x7684;&#x4FE1;&#x606F;&#x5916;&#xFF0C;&#x8FD8;&#x6709;&#x8BF7;&#x6C42;&#x548C;&#x54CD;&#x5E94;&#x7684;&#x6B63;&#x6587;&#x53CA;&#x5143;&#x6570;&#x636E;&#x3002;</td>
</tr>
</tbody>
</table>
<ul>
<li>3.2.&#x914D;&#x7F6E;&#x65E5;&#x5FD7;&#xFF08;&#x5728;&#x6D88;&#x8D39;&#x7AEF;&#xFF09;</li>
</ul>
<p>  &#x914D;&#x7F6E;&#x65E5;&#x5FD7;bean</p>
<pre><code class="lang-java">    <span class="hljs-meta">@Configuration</span>
    <span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">FeignConfig</span> </span>{
        <span class="hljs-meta">@Bean</span>
        Logger.<span class="hljs-function">Level <span class="hljs-title">feignLoggerLevel</span><span class="hljs-params">()</span></span>{
            <span class="hljs-keyword">return</span> Logger.Level.FULL;
        }
    }
</code></pre>
<p>  &#x914D;&#x7F6E;&#x6D88;&#x8D39;&#x7AEF;&#x7684;yaml&#x6587;&#x4EF6;</p>
<pre><code class="lang-yml"><span class="hljs-attr">  logging:</span>
<span class="hljs-attr">    level:</span>
      <span class="hljs-comment"># feign &#x65E5;&#x5FD7;&#x4EE5;&#x4EC0;&#x4E48;&#x7EA7;&#x522B;&#x76D1;&#x63A7;&#x54EA;&#x4E2A;&#x63A5;&#x53E3;</span>
      com............RemotePaymentService: debug
</code></pre>
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